add img remove button element

backstage/static/js/blockElements.js

@@ -41,6 +41,10 @@ function getImgElements(blockDiv) {
   const imgDiv = document.createElement("div");
   const img = document.createElement("img");
   const imgInput = document.createElement("INPUT");
+  const widthInput = document.createElement("INPUT");
+  const heightInput = document.createElement("INPUT");
+  const imgInputButton = document.createElement('button');
+  const imgRemoveButton = document.createElement('button');
   imgInput.setAttribute("type", "file");
   imgInput.addEventListener('change', function(event) {
     if (event.target.files[0]) {
@@ -53,17 +57,16 @@ function getImgElements(blockDiv) {
       })
     }
   });
-  const widthInput = document.createElement("INPUT");
-  const heightInput = document.createElement("INPUT");
-  const imgInputButton = document.createElement('button');
   imgInputButton.textContent = 'Image新增/修改';
+  imgRemoveButton.textContent = 'Image刪除';
   blockDiv.appendChild(imgDiv);
-  imgDiv.append(img, imgInput, widthInput, heightInput, imgInputButton);
+  imgDiv.append(img, imgInput, widthInput, heightInput, imgInputButton, imgRemoveButton);
   return {
     img: img,
     imgInput: imgInput,
     widthInput: widthInput,
     heightInput: heightInput,
-    imgInputButton: imgInputButton
+    imgInputButton: imgInputButton,
+    imgRemoveButton: imgRemoveButton
   };
 }